The gunsmith is pretty much useless after level 20 (besides synths and bounties). So I think he should start selling guns that are useful to where you are at in the game. He sells uncommon tier gear and most players stop using that around level 20. So if he starts selling rare gear at level 18 or so then people would get more use out of him. Then at level 26 he could start selling legendaries and he could actually be considered a gunsmith not a synth dealer. Another thing that he could do is sell materials for upgrading weapons. Comment your ideas for making the gunsmith a more often used vender.